摘要
Studying the behavior of effective ion charge Zeff, which indicates the degree of pollution of plasma and can provide valuable information about many processes taking place in plasma, mechanisms of the releasing impurities, transport, etc is of great interest. This paper describes the development of the Zeff diagnostic system for the Globus-M2 tokamak. The effective ion charge is determined on the basis of measurements of the bremsstrahlung intensity and Thomson scattering data-Te and ne profiles. The results of the first Zeff measurements obtained for several discharges on the Globus-M tokamak are presented in this paper. The results have been validated by simulation using the ASTRA transport code for the same discharges, and it has demonstrated a good agreement with the experimental results.
Studying the behavior of effective ion charge Zeff,which indicates the degree of pollution of plasma and can provide valuable information about many processes taking place in plasma,mechanisms of the releasing impurities,transport,etc is of great interest.This paper describes the development of the Zeffdiagnostic system for the Globus-M2 tokamak.The effective ion charge is determined on the basis of measurements of the bremsstrahlung intensity and Thomson scattering data—Teand neprofiles.The results of the first Zeffmeasurements obtained for several discharges on the Globus-M tokamak are presented in this paper.The results have been validated by simulation using the ASTRA transport code for the same discharges,and it has demonstrated a good agreement with the experimental results.
基金
funded by RSF according to the research project(No.17-72-20076).The experimental investigations were performed on the Unique Scientific Facility ‘Spherical tokamak Globus-M’,which is incorporated in the Federal Joint Research Center ‘Material science and characterization in advanced technology’.The maintenance of routine diagnostics was supported by the Ioffe Institute
